It has been over 2 years since I first posted this question. I don't find that I have many problems with bubbles anymore. I still get bubbles of course, I don't think you can always be free of bubbles. Now that I use the tipless bags, I just get my hands barely wet and roll the filled bag between my hands for a little bit and that seems to push the bubbles out the top. I have also found that a good flood consistency, where the icing runs off the stir paddle like a ribbon, allows the bubbles to rise and escape easily. Practice makes everything easier and better! I love hearing everyones experiences and solutions.